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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div></div>





    <script>
        var div = document.querySelector('div');
        div.innerHTML = getDate();
            function getDate() {
                var date = new Date();
                var year = date.getFullYear();
                var mouth = date.getMonth() + 1;
                var dates = date.getDate();
                var arr = ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六']
                var day = date.getDay();
                return '今天是：' + year + '年' + mouth + '月' + dates + '日' + arr[day];

            }
    </script>
</body>

</html>